Fusible link.



J. R. HAMILTON. FUSIBLE LINK.

APPLICATION FILED JUNE 21,191].

1,024,725. Patented Apr. 30, 1912.

UNITED STATES OFFICE.

JOHN R. HAMILTON, OF YONKERS, NEW YOI lIK, ASSIGNOR TO AUTOMATIC SPRINKLER COMPANY OF AMERICA, 01? NEW YORK, N. Y., A CORPORATION OF NEW YORK.

FUSIBLE Lmk.

Application filed June 21,

To all whom it may concern:

Be it known that I, Jonx ll. llmnLToN, a citizen of the United States. and resident of Yonkers, county of lvestchester, State 0t S ew York. have invented certain new and useful linprmenn-nls Relating; to l usible Links, of which the following is a specific-.1- tion, taken in eonnu'tion with the accompanying drawing. which forms part of the same.

This invention relates to fusible links and relates especially to fusible connecting links suitable For use with lire doors, windows and so forth.

The fusible links: may comprise link members formed of sheet metal provided with integral pivots and an interposed strut having sockets aelia 'cnt its diagonally opposite corners, the e members; being releasably connected by Fusible solder and so arranged that the diagonal sockets ot the strut render the parts aul niatically disengaging in the plane of the link members and correspondingly promote their releasing action under emergency (:omlitions.

ln the accompanying drawings showing several illustrative (fill)OtllIlHlltH of this invention, Figure. l a transverse section taken substantially along the line l-1 of Fig. 2. Fig. 2 is a. side view, parts being broken away. and Fig. 3 shows the parts in separated position. Fig. 4 is a side sectional vie of another embodiment; of the invention taken along the line -l4 of Fig. 5. Fig. 6 is a side view thereof, parts being broken away. Fig. (i is a view oE this modification with the parts in separated position.

As indicated in Figs. 1 to 3, the fusible connecting link may comprise the link member or plate 1 provided with a eentral lorated hole or other attaching means for the flexible onnector such as the chain. cord or the like with which the link'niay be used. and if desired the attaching hole in this link member may be provided with a suitable il-in Forcing ferrule such as This link member as indicated in Fig. 3 may be provided sil s-"exit its tree end with a suitable 1.11M. i l whi h may be readily formed integral \iltll thelink ineniliier by punching n stai'npino; ip this pivot from the sheet metal of ii hu-h the link member may be con; strueteil. 'lhe nk may also comprise a simi lar lint. nmnl er lot sheet metal having-assimi- Specification of Letters Patent.

Patented Apr. 30, 1912.

1911. Serial No. 634,633.

l lar axially located attaching hole and ferrule 5 and also provided with the pivot T which may be similarly formed integral-with the link member by punching", stamping or otherwise. The link may also comprise a suitable strut cooperating with the trio link members and it desired interposei'l between them and provided with suitablediagranally arranged sockets coi'iperatinsz with the pivots of the link members. 'lhe'strul 3 may be formed of sheet metal and provided with suitable sockets t5 and ll which ma. be diagonally located in any convenient pr. silion. preferablyadjacent the diagonally opposite corners at the two ends of the strut so as to cooperate with the link mom-- ber pivots and have an autvnatiealh lisengaging action in the plane of the link members which tend to separate sidewise during their emergency release. as indi ated by the arrows in Fig. 2. The ends l the. st rut are preferably formed with releasing edges and may be provided with suitable pivot. shoulders l6. 17. preferably proj ct inc slightly beyond the pivots and the strut also preferably having the carved relea ing edges 12, 13 so as to further minimize n lert'erence with the movement ot the parts, as the strut swings laterally about the link member pivots. It is of" course understood that thmparts of the link ma be relmisal'ily connected by any suitable fusible rolller or material 14, 15 melting or becoming rli lrased when the temperature rises to the desired point, for instance. By making the operat ing parts of the strut and link members of the same width the assembly and soldering of the link is correspondingly facilitated.

When the link is inposition with the link members connected to a suitable flexible connector which is kept under tension, the pivots and sockets have a positive action, reventing undesirable creeping of the SQL der or other releasable material and preventing the unintentional release of the link. Under emergency conditions, however, the solder or other material is released and the link members are thus free. to separate in an: direction under the strainot the atta -lied connectors so that even if connected with still cord so that. the flat link member-1 are not free to move apart in substantially parallel position, the diagonal or non-a zial ment of the pivots and cooperati fl:

sockets insures the swinging apart of the flat link members about the pivots so that the parts are effectively released, the contour of the strut ends minimizing the possibility of interference with any projecting portions of the solder during this releasing movement.

In the modified embodiment of the invention shown in Figs. 4 to (i, the parts are similarly constructed and arranged, except that the strut 22 is given a different contour and is provided with the square ends 18, 21 adjacent the diagonally arranged sockets 6 and 11 and with the relieved corners 19, 20 to minimize wedging or sticking during the release of the link.

Having described this invention in connection with a number of illustrative embodiments, forms proportions and arrange ments of parts, to the details of which disclosure the invention is not of course to be limited, what is claimed as new and what is desired to be secured by Letters Patent is set forth in the appended claims.

1. The fusible connecting link having attaching means at its opposite ends and comprising a pair of link members each formed of sheet metal and provided with a reinforcing ferrule around the axial attaching means at one end and )rovided with an in tegral pivot stamped mm the sheet metal and located away from the axis of the link member and adjacent its free end, a sheet metal strut interposed between said link members and provided with diagonally arranged sockets engaged by the pivots of the link members and having automatic discngaging action in the plane of the link members and provided with curved relieved ends comprising pivot shoulders on the diagonal corners of the strut adjacent said pivots and comprising curved relieved edges on the other dialgonal corners 'of the strut, said parts bein releasably connected by fusible solder to rmly retain the arts in normal holding position and to al ow their emergcucy release.

2. The fusible connecting link having attaching means at its opposite ends and comprising a pair of link members each formed of sheet metal. and provided with an integral pivot stamped from the sheet metal and located away from the axis of the link member and adjacent its free end, a sheet metal strut interposed between said link members and provided with diagonally arranged sockcts engaged by the pivots of the link members and having automatic disengaging action in the plane of the link members and provided with curved relieved ends comprising pivot shoulders on the diagonal corners of the strut adjacent said pivots and comprising curved relieved edges on the other diagonal corners of the strut, said parts being relcasably connected by fusible solder to firmly retain the parts in normal holding position and to allow their emergency release.

3. The fusible connecting link having attaching means at its opposite endsand comprising a pair of link members each formed of sheet metal and provided with an integral pivot stamped from the sheet metal and located awa v from the axis of the link member and adjacent its free end, a sheet metal strut interposed between said link members and provided with diagonally arranged sockets engagcd by the pivots ot the link members and having automatic ll. \Ilgaging action in the plane of the link members and provided with rclievcd endscomprising curved relieved edges on the unpiv oted diagonal corners of the strut, said parts being rcleasably connected by fusible solder to firmly retain the parts in normal holding position and to allow their emergency re lease.

4. The fusible connecting link having attaching means at its opposite ends and comprising a pair of link members each formed of sheet metal and provided with an integral pivot stamped from the sheet metal and located away from the axis of the link lnepiber and adjacent its free end, a sheet metal strut interposed between said link members and provided with diagonally ar ranged sockets engaged by the pivots ot' the link members and having automatic discugaging action in the plane of the link memhers and provided with relieved ends, said parts bein rclcasably connected by fusible solder to firmly retain the parts in normal holding position and to allow their cmcr gency release.

5. The releasable link comprising a pair of link members each provided with a pivot located away from the axis of the link incm her and adjacent its free. end, a strut interposed between said link members and provided with diagonally arranged sockets engaged by the pivots of the link members and having automatic disengaging action in the plane of the link members and provided with relieved ends. said parts being releasaldy connected to firmly retain the parts in normal holding position and to allow their emergency release.

6. The releasable link comprising a pair of link members each provided with a pivot located away from the axis of the link memher, a strut interposed between said link members and provided with diagonally arranged sockets engaged by the pivots of the link members and having automatic disengaging action in the plane of the link members, said parts being relcasably connected to firmly retain the parts in normal holding position and to allow their emergen y rclease.

7. The fusible connecting link comprising a pair of link members each provided with attaching means adjacent the opposite ends of the link and adapted to be connected with devices normally holding the link in tension, a strut cooperating with said link members and diagonally arranged sockets and pivoting connections between said strut and said link members having automatic disengaging action in the plane of the link members, said parts being releasably connected to firmly retain the parts in normal holding position and to allow their emergency release.

8. The fusible connecting link comprising a pair of link members each provided with attaching means adjacent the opposite ends of the linkand adapted to be connected with devices normally holding the link in tesion,

-a strut co'tiperating with said link members and diagonally arranged pivoting connections between said strut and said link members having automatic disengaging action in the plane. of the link members, said parts tension, a sheet metal being releasably connected to firmly retain the parts in normal holding position and to allow their emergency release.

of sheet metal and adapted to be connected.

the link in strut interposed between said link members, and diagonally arrangedpivoting connections between said strut and said link members matic disengaging action in the plane of the link members, (said parts being connected by releasable material to firmly retain the parts in normal holding position and allow their emergency release.

JOHN

with devices normally holding R. HAMILTON.

' Witnesses:

HARRY L. Duncan, Jnssm B. KAY.

having auto- 

